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libvirt/src/util/virnuma.h

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rename qemuGetNumadAdvice to virNumaGetAutoPlacementAdvice qemuGetNumadAdvice will be used by LXC driver, rename it to virNumaGetAutoPlacementAdvice and move it to virnuma.c Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
2013-03-18 17:04:01 +08:00
/*
* virnuma.h: helper APIs for managing numa
*
numatune: create new module for numatune There are many places with numatune-related code that should be put into special numatune_conf and this patch creates a basis for that. Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-06-06 16:50:39 +02:00
* Copyright (C) 2011-2014 Red Hat, Inc.
rename qemuGetNumadAdvice to virNumaGetAutoPlacementAdvice qemuGetNumadAdvice will be used by LXC driver, rename it to virNumaGetAutoPlacementAdvice and move it to virnuma.c Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
2013-03-18 17:04:01 +08:00
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#ifndef __VIR_NUMA_H__
# define __VIR_NUMA_H__
NUMA: cleanup for numa related codes Intend to reduce the redundant code,use virNumaSetupMemoryPolicy to replace virLXCControllerSetupNUMAPolicy and qemuProcessInitNumaMemoryPolicy. This patch also moves the numa related codes to the file virnuma.c and virnuma.h Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
2013-03-20 11:35:08 +08:00
# include "internal.h"
# include "virbitmap.h"
# include "virutil.h"
rename qemuGetNumadAdvice to virNumaGetAutoPlacementAdvice qemuGetNumadAdvice will be used by LXC driver, rename it to virNumaGetAutoPlacementAdvice and move it to virnuma.c Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
2013-03-18 17:04:01 +08:00
char *virNumaGetAutoPlacementAdvice(unsigned short vcups,
unsigned long long balloon);
numa: split util/ and conf/ and support non-contiguous nodesets This is a reaction to Michal's fix [1] for non-NUMA systems that also splits out conf/ out of util/ because libvirt_util shouldn't require libvirt_conf if it is the other way around. This particular use case worked, but we're trying to avoid it as mentioned [2], many times. The only functions from virnuma.c that needed numatune_conf were virDomainNumatuneNodesetIsAvailable() and virNumaSetupMemoryPolicy(). The first one should be in numatune_conf as it works with virDomainNumatune, the second one just needs nodeset and mode, both of which can be passed without the need of numatune_conf. Apart from fixing that, this patch also fixes recently added code (between commits d2460f85^..5c8515620) that doesn't support non-contiguous nodesets. It uses new function virNumaNodesetIsAvailable(), which doesn't need a stub as it doesn't use any libnuma functions, to check if every specified nodeset is available. [1] https://www.redhat.com/archives/libvir-list/2014-November/msg00118.html [2] http://www.redhat.com/archives/libvir-list/2011-June/msg01040.html Signed-off-by: Martin Kletzander <mkletzan@redhat.com>
2014-11-06 12:16:54 +01:00
int virNumaSetupMemoryPolicy(virDomainNumatuneMemMode mode,
virBitmapPtr nodeset);
numa: Introduce virNumaIsAvailable and use it instead of numa_available All functions from libnuma must be protected with ifdefs. Avoid this by using our own wrapper.
2013-10-17 16:57:29 +02:00
numa: Rename virNumaGetHostNodeset and make it return only nodes with memory Name it virNumaGetHostMemoryNodeset and return only NUMA nodes which have memory installed. This is necessary as the kernel is not very happy to set the memory cgroup setting for nodes which do not have any memory. This would break vcpu hotplug with following message on such configruation: Invalid value '0,8' for 'cpuset.mems': Invalid argument Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1375268
2016-09-13 15:55:06 +02:00
virBitmapPtr virNumaGetHostMemoryNodeset(void);
Revert "Prevent more compiler optimization of mockable functions" This reverts commit e4b980c853d2114b25fa805a84ea288384416221. When a binary links against a .a archive (as opposed to a shared library), any symbols which are marked as 'weak' get silently dropped. As a result when the binary later runs, those 'weak' functions have an address of 0x0 and thus crash when run. This happened with virtlogd and virtlockd because they don't link to libvirt.so, but instead just libvirt_util.a and libvirt_rpc.a. The virRandomBits symbols was weak and so left out of the virtlogd & virtlockd binaries, despite being required by virHashTable functions. Various other binaries like libvirt_lxc, libvirt_iohelper, etc also link directly to .a files instead of libvirt.so, so are potentially at risk of dropping symbols leading to a later runtime crash. This is normal linker behaviour because a weak symbol is not treated as undefined, so nothing forces it to be pulled in from the .a You have to force the linker to pull in weak symbols using -u$SYMNAME which is not a practical approach. This risk is silent bad linkage that affects runtime behaviour is not acceptable for a fix that was merely trying to fix the test suite. So stop using __weak__ again. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-12 11:07:17 +01:00
bool virNumaNodesetIsAvailable(virBitmapPtr nodeset) ATTRIBUTE_NOINLINE;
bool virNumaIsAvailable(void) ATTRIBUTE_NOINLINE;
int virNumaGetMaxNode(void) ATTRIBUTE_NOINLINE;
bool virNumaNodeIsAvailable(int node) ATTRIBUTE_NOINLINE;
virnuma: Introduce virNumaGetDistances The API gets a NUMA node and find distances to other nodes. The distances are returned in an array. If an item X within the array equals to value of zero, then there's no such node as X. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2014-06-02 12:06:56 +02:00
int virNumaGetDistances(int node,
int **distances,
Revert "Prevent more compiler optimization of mockable functions" This reverts commit e4b980c853d2114b25fa805a84ea288384416221. When a binary links against a .a archive (as opposed to a shared library), any symbols which are marked as 'weak' get silently dropped. As a result when the binary later runs, those 'weak' functions have an address of 0x0 and thus crash when run. This happened with virtlogd and virtlockd because they don't link to libvirt.so, but instead just libvirt_util.a and libvirt_rpc.a. The virRandomBits symbols was weak and so left out of the virtlogd & virtlockd binaries, despite being required by virHashTable functions. Various other binaries like libvirt_lxc, libvirt_iohelper, etc also link directly to .a files instead of libvirt.so, so are potentially at risk of dropping symbols leading to a later runtime crash. This is normal linker behaviour because a weak symbol is not treated as undefined, so nothing forces it to be pulled in from the .a You have to force the linker to pull in weak symbols using -u$SYMNAME which is not a practical approach. This risk is silent bad linkage that affects runtime behaviour is not acceptable for a fix that was merely trying to fix the test suite. So stop using __weak__ again. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-12 11:07:17 +01:00
int *ndistances) ATTRIBUTE_NOINLINE;
numa: Introduce virNumaGetNodeMemory and use it instead of numa_node_size64
2013-10-17 18:30:09 +02:00
int virNumaGetNodeMemory(int node,
unsigned long long *memsize,
Revert "Prevent more compiler optimization of mockable functions" This reverts commit e4b980c853d2114b25fa805a84ea288384416221. When a binary links against a .a archive (as opposed to a shared library), any symbols which are marked as 'weak' get silently dropped. As a result when the binary later runs, those 'weak' functions have an address of 0x0 and thus crash when run. This happened with virtlogd and virtlockd because they don't link to libvirt.so, but instead just libvirt_util.a and libvirt_rpc.a. The virRandomBits symbols was weak and so left out of the virtlogd & virtlockd binaries, despite being required by virHashTable functions. Various other binaries like libvirt_lxc, libvirt_iohelper, etc also link directly to .a files instead of libvirt.so, so are potentially at risk of dropping symbols leading to a later runtime crash. This is normal linker behaviour because a weak symbol is not treated as undefined, so nothing forces it to be pulled in from the .a You have to force the linker to pull in weak symbols using -u$SYMNAME which is not a practical approach. This risk is silent bad linkage that affects runtime behaviour is not acceptable for a fix that was merely trying to fix the test suite. So stop using __weak__ again. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-12 11:07:17 +01:00
unsigned long long *memfree) ATTRIBUTE_NOINLINE;
numa: Introduce virNumaGetMaxNode and use it instead of numa_max_node Avoid necessary checks for the numa library with this helper.
2013-10-17 17:42:22 +02:00
numa: Replace NUMA_MAX_N_CPUS macro with virNumaGetMaxCPUs()
2013-10-18 14:43:34 +02:00
unsigned int virNumaGetMaxCPUs(void);
Revert "Prevent more compiler optimization of mockable functions" This reverts commit e4b980c853d2114b25fa805a84ea288384416221. When a binary links against a .a archive (as opposed to a shared library), any symbols which are marked as 'weak' get silently dropped. As a result when the binary later runs, those 'weak' functions have an address of 0x0 and thus crash when run. This happened with virtlogd and virtlockd because they don't link to libvirt.so, but instead just libvirt_util.a and libvirt_rpc.a. The virRandomBits symbols was weak and so left out of the virtlogd & virtlockd binaries, despite being required by virHashTable functions. Various other binaries like libvirt_lxc, libvirt_iohelper, etc also link directly to .a files instead of libvirt.so, so are potentially at risk of dropping symbols leading to a later runtime crash. This is normal linker behaviour because a weak symbol is not treated as undefined, so nothing forces it to be pulled in from the .a You have to force the linker to pull in weak symbols using -u$SYMNAME which is not a practical approach. This risk is silent bad linkage that affects runtime behaviour is not acceptable for a fix that was merely trying to fix the test suite. So stop using __weak__ again. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-12 11:07:17 +01:00
int virNumaGetNodeCPUs(int node, virBitmapPtr *cpus) ATTRIBUTE_NOINLINE;
numa: Add wrapper of numa_node_to_cpus and use it
2013-10-18 16:21:24 +02:00
virnuma: Introduce pages helpers For future work we need two functions that fetches total number of pages and number of free pages for given NUMA node and page size (virNumaGetPageInfo()). Then we need to learn pages of what sizes are supported on given node (virNumaGetPages()). Note that system page size is disabled at the moment as there's one issue connected. If you have a NUMA node with huge pages allocated the kernel would return the normal size of memory for that node. It basically ignores the fact that huge pages steal size from the system memory. Until we resolve this, it's safer to not confuse users and hence not report any system pages yet. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2014-06-06 18:09:01 +02:00
int virNumaGetPageInfo(int node,
unsigned int page_size,
virNumaGetPageInfo: Take huge pages into account On the Linux kernel, if huge pages are allocated the size they cut off from memory is accounted under the 'MemUsed' in the meminfo file. However, we want the sum to be subtracted from 'MemTotal'. This patch implements this feature. After this change, we can enable reporting of the ordinary system pages in the capability XML: <capabilities> <host> <uuid>01281cda-f352-cb11-a9db-e905fe22010c</uuid> <cpu> <arch>x86_64</arch> <model>Haswell</model> <vendor>Intel</vendor> <topology sockets='1' cores='1' threads='1'/> <feature/> <pages unit='KiB' size='4'/> <pages unit='KiB' size='2048'/> <pages unit='KiB' size='1048576'/> </cpu> <power_management/> <migration_features/> <topology> <cells num='4'> <cell id='0'> <memory unit='KiB'>4048248</memory> <pages unit='KiB' size='4'>748382</pages> <pages unit='KiB' size='2048'>3</pages> <pages unit='KiB' size='1048576'>1</pages> <distances/> <cpus num='1'> <cpu id='0' socket_id='0' core_id='0' siblings='0'/> </cpus> </cell> ... </cells> </topology> </host> </capabilities> You can see the beautiful thing about this: if you sum up all the <pages/> you'll get <memory/>. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2014-06-23 15:04:11 +02:00
unsigned long long huge_page_sum,
virNumaGetHugePageInfo: Return page_avail and page_free as ULL https://bugzilla.redhat.com/show_bug.cgi?id=1569678 On some large systems (with ~400GB of RAM) it is possible for unsigned int to overflow in which case we report invalid number of 4K pages pool size. Switch to unsigned long long. We hit overflow in virNumaGetPages when doing: huge_page_sum += 1024 * page_size * page_avail; because although 'huge_page_sum' is an unsigned long long, the page_size and page_avail are both unsigned int, so the promotion to unsigned long long doesn't happen until the sum has been calculated, by which time we've already overflowed. Turning page_avail into a unsigned long long is not strictly needed until we need ability to represent more than 2^32 4k pages, which equates to 16 TB of RAM. That's not outside the realm of possibility, so makes sense that we change it to unsigned long long to avoid future problems. Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2018-04-23 16:36:53 +02:00
unsigned long long *page_avail,
unsigned long long *page_free);
virnuma: Introduce pages helpers For future work we need two functions that fetches total number of pages and number of free pages for given NUMA node and page size (virNumaGetPageInfo()). Then we need to learn pages of what sizes are supported on given node (virNumaGetPages()). Note that system page size is disabled at the moment as there's one issue connected. If you have a NUMA node with huge pages allocated the kernel would return the normal size of memory for that node. It basically ignores the fact that huge pages steal size from the system memory. Until we resolve this, it's safer to not confuse users and hence not report any system pages yet. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2014-06-06 18:09:01 +02:00
int virNumaGetPages(int node,
unsigned int **pages_size,
virNumaGetHugePageInfo: Return page_avail and page_free as ULL https://bugzilla.redhat.com/show_bug.cgi?id=1569678 On some large systems (with ~400GB of RAM) it is possible for unsigned int to overflow in which case we report invalid number of 4K pages pool size. Switch to unsigned long long. We hit overflow in virNumaGetPages when doing: huge_page_sum += 1024 * page_size * page_avail; because although 'huge_page_sum' is an unsigned long long, the page_size and page_avail are both unsigned int, so the promotion to unsigned long long doesn't happen until the sum has been calculated, by which time we've already overflowed. Turning page_avail into a unsigned long long is not strictly needed until we need ability to represent more than 2^32 4k pages, which equates to 16 TB of RAM. That's not outside the realm of possibility, so makes sense that we change it to unsigned long long to avoid future problems. Signed-off-by: Michal Privoznik <mprivozn@redhat.com> Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
2018-04-23 16:36:53 +02:00
unsigned long long **pages_avail,
unsigned long long **pages_free,
virnuma: Introduce pages helpers For future work we need two functions that fetches total number of pages and number of free pages for given NUMA node and page size (virNumaGetPageInfo()). Then we need to learn pages of what sizes are supported on given node (virNumaGetPages()). Note that system page size is disabled at the moment as there's one issue connected. If you have a NUMA node with huge pages allocated the kernel would return the normal size of memory for that node. It basically ignores the fact that huge pages steal size from the system memory. Until we resolve this, it's safer to not confuse users and hence not report any system pages yet. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2014-06-06 18:09:01 +02:00
size_t *npages)
Revert "Prevent more compiler optimization of mockable functions" This reverts commit e4b980c853d2114b25fa805a84ea288384416221. When a binary links against a .a archive (as opposed to a shared library), any symbols which are marked as 'weak' get silently dropped. As a result when the binary later runs, those 'weak' functions have an address of 0x0 and thus crash when run. This happened with virtlogd and virtlockd because they don't link to libvirt.so, but instead just libvirt_util.a and libvirt_rpc.a. The virRandomBits symbols was weak and so left out of the virtlogd & virtlockd binaries, despite being required by virHashTable functions. Various other binaries like libvirt_lxc, libvirt_iohelper, etc also link directly to .a files instead of libvirt.so, so are potentially at risk of dropping symbols leading to a later runtime crash. This is normal linker behaviour because a weak symbol is not treated as undefined, so nothing forces it to be pulled in from the .a You have to force the linker to pull in weak symbols using -u$SYMNAME which is not a practical approach. This risk is silent bad linkage that affects runtime behaviour is not acceptable for a fix that was merely trying to fix the test suite. So stop using __weak__ again. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
2017-07-12 11:07:17 +01:00
ATTRIBUTE_NONNULL(5) ATTRIBUTE_NOINLINE;
virnuma: Introduce virNumaSetPagePoolSize This internal API can be used to allocate or free some pages in the huge pages pool. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
2014-09-18 09:24:16 +02:00
int virNumaSetPagePoolSize(int node,
unsigned int page_size,
unsigned long long page_count,
bool add);
rename qemuGetNumadAdvice to virNumaGetAutoPlacementAdvice qemuGetNumadAdvice will be used by LXC driver, rename it to virNumaGetAutoPlacementAdvice and move it to virnuma.c Signed-off-by: Gao feng <gaofeng@cn.fujitsu.com>
2013-03-18 17:04:01 +08:00
#endif /* __VIR_NUMA_H__ */
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